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630 Stainless Steel｜Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司）
A precipitation-hardening stainless (17-4PH) that after aging reaches strength and hardness far above 304/316L while keeping good corrosion resistance and weldability — 'the structural steel among stainless'.
630不锈钢（17-4PH）
Precipitation HardeningA precipitation-hardening stainless (17-4PH) that after aging reaches strength and hardness far above 304/316L while keeping good corrosion resistance and weldability — 'the structural steel among stainless'.
Standards
| GB (China) | 05Cr17Ni4Cu4Nb（旧0Cr17Ni4Cu4Nb） |
|---|---|
| EN (Europe) | 1.4542 / X5CrNiCuNb16-4 |
| ASTM/UNS (USA) | 630 / UNS S17400 |
| JIS (Japan) | SUS630 |
Chemical composition (wt%)
| Chemical composition (wt%) | % |
|---|---|
C | ≤0.07 |
Si | ≤1.00 |
Mn | ≤1.00 |
Cr | 15.0–17.5 |
Ni | 3.0–5.0 |
Cu | 3.0–5.0 |
Nb | 0.15–0.45 |
Density：7.78 g/cm³
Performance
A precipitation-hardening stainless (17-4PH) that after aging reaches strength and hardness far above 304/316L while keeping good corrosion resistance and weldability — 'the structural steel among stainless'.
Use cases
Aerospace parts, valves and pumps, gear shafts, medical devices, load-bearing parts needing both high strength and corrosion resistance.
Characteristics
Strength tuned by heat treatment (H900/H1025 etc.), with good strength-corrosion balance; magnetic.
Pitfalls & cautions
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